A mobile on-site rapid deployment open compression field system and method

Abstract

The present invention discloses a system and method for rapidly deploying an open compact field on-site, which includes a flying wing open movable cabin module, a reflective surface and back frame module, a feed and bracket module, a multi-point laser alignment module, a target support and calibration module, a radio frequency transceiver module, and an absorber module. The mobile cabin design has the ability to be deployed on-site over long distances, breaking the technical barriers of the traditional fixed compact field site, and achieving the technical goal of accurately testing RCS and antenna patterns at the target site; the open flying wing and external feed design break through the internal size limitations of the cabin, and are suitable for testing requirements of larger targets and antennas; the automatic push-out and retraction of the reflective surface, electric leveling, multi-point laser feed alignment, and unified feed interface design are adopted. After the system arrives at the target site, it can complete rapid deployment and meet testing conditions within 90 minutes, and the system can be stored within 30 minutes after completing the test task.

Description

Technical Field

[0001] The present invention relates to an electromagnetic characteristic testing technology, and in particular to a mobile on-site rapid deployment open compact field system and method. Background Art

[0002] Compact range test systems are the preferred solution for high-precision target radar cross section and antenna pattern testing and evaluation. Traditional compact ranges offer advantages such as high precision, low background, all-weather operation, and excellent confidentiality. However, these ranges are typically built within a fixed, enclosed anechoic chamber. Once constructed, these systems cannot be moved, requiring the target to be placed within the quiet zone of the fixed compact range test system for testing. Therefore, these fixed compact ranges cannot meet the rapid deployment and measurement requirements for target deployment, particularly during maintenance or range testing.

[0003] Currently, the near-field scanning method is commonly used to meet the needs of on-site rapid scanning tests of the target under test. However, near-field scanning measures the relative value between the target under test and the calibration object, and cannot achieve accurate RCS measurement.

[0004] At the same time, although placing the compact range in a mobile anechoic chamber can solve the problem of mobile deployment of the compact range, the target under test still needs to be set up inside the anechoic chamber during the measurement process. Due to the size of the mobile chamber, the typical quiet zone cross-section size provided by this solution is less than 1 meter, which does not meet the requirements for accurate on-site rapid electromagnetic characteristics testing of larger targets under test.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a mobile on-site rapid deployment open compact range system and method, so as to overcome the problem that the traditional compact range in the prior art cannot meet the test requirements of rapid deployment at the target site to achieve accurate RCS and antenna pattern measurement and evaluation.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] The movable on-site rapid deployment open compact field system of the present invention comprises a flying wing open movable shelter module, a reflective surface and back frame module, a feed source and bracket module, a multi-point laser alignment module, a target support and calibration module, a radio frequency post-transmission module and an absorbing module;

[0009] The flying wing open movable cabin module includes a supporting foot, a movable traction bearing base, a flying wing open cabin, and an electric push rod;

[0010] The supporting feet are used to fix the mobile traction bearing base;

[0011] The mobile traction bearing base can realize long-distance mobile transportation of the test system through the traction vehicle head;

[0012] The flying wing open cabin is fixed on a mobile traction bearing base, and the flying wings on both sides are expanded and retracted by electric push rods.

[0013] The method for implementing the on-site deployment of the above-mentioned mobile on-site rapid deployment open compact field system is characterized by comprising the following steps:

[0014] S1: Transportation to the test site and on-site positioning in the compact field: After the vehicle is pulled to the test site, the compact field is positioned so that the target is within the quiet zone of the compact field. The flying wing open cabin (and other internal modules) are fixed with support feet. This step takes less than 10 minutes.

[0015] S2: Pushing out and leveling the reflective surface: Power is turned on and the electrically controlled electric push rod opens the side door of the flying wing shelter. The electrically controlled electric telescopic slide base pushes out the back frame and reflective surface module and levels them using the electrically controlled reflective surface leveling legs. The leveling accuracy is better than 0.1° and this step takes less than 5 minutes to complete.

[0016] S3: Positioning of feed and bracket module, target support and calibration module;

[0017] S4: Laying of absorbing modules: In this embodiment, the thin materials permanently laid include: pyramidal absorbing materials in the cabin and pyramidal absorbing materials behind the feed probe;

[0018] S5: Complete the target feature test task. The test time is not included in the total deployment time.

[0019] S6: System storage, test completed: The electrically controlled electric telescopic slide base first retracts the reflective surface and reflective surface mounting back frame into the cabin, and the electrically controlled electric leveling legs are retracted; the feed source and bracket module turntable are stored in the flying wing open cabin; the target support and calibration module are stored in the flying wing open cabin; the thatch absorbing material on the feed source bracket and the ground axe-chopped absorbing material are recovered in the flying wing open cabin; the flying wing cabin side door is retracted, and the power is turned off to complete the test; this step takes less than 30 minutes to implement.

[0020] Compared with the existing technology, the present invention provides a mobile on-site rapid deployment open compact field system and method. The mobile cabin design enables the system to be transported over long distances and provide on-site testing services. The open flying wing and external feed design give the system a larger quiet zone size to meet the testing needs of larger targets. The automatic extension and leveling of the reflective surface and the laser positioning design enable the system to be rapidly deployed on-site.

[0021] This invention breaks the barriers of traditional compact ranges, enabling rapid deployment of larger targets and precise RCS measurement and evaluation. This breakthrough, which limits testing to a fixed, enclosed chamber, aims to enable rapid deployment of targets and on-site testing and evaluation of electromagnetic characteristics, including precise RCS measurements and antenna patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1a 、 Figure 1b They are respectively a composition diagram of a mobile on-site rapid deployment open compact field system and an enlarged schematic diagram of its A part provided by an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the flying wing open movable shelter module structure in an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the structure of the reflective surface and back frame module in an embodiment of the present invention;

[0025] Figure 4a 、 Figure 4b 、 Figure 4c 、 Figure 4d 、 Figure 4e They are respectively a schematic diagram of the feed source and bracket module structure, a schematic diagram of the unified interface feed source, a schematic diagram of the quick installation positioning plate and a detailed diagram of its positioning and mounting holes, and a detailed diagram of the corner mounting holes in an embodiment of the present invention;

[0026] Figure 5a 、 Figure 5b 、 Figure 5c Schematic diagram of the layout and alignment principle of the multi-point laser alignment module, schematic diagram of the feed positioning laser, and schematic diagram of the cross laser for positioning the center of the quiet zone in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the target support and calibration module structure in an embodiment of the present invention;

[0028] Figure 7 This is a flow chart of on-site deployment testing of an embodiment of the present invention.

[0029] In the picture:

[0030] 1. Flying wing open movable shelter module: 11. Support feet; 12. Mobile traction bearing base; 13. Flying wing open shelter; 14. Electric push rod;

[0031] 2. Reflecting surface and back frame module: 21. Reflecting surface; 22. Reflecting surface mounting back frame; 23. Electric telescopic slide base; 24. Electric leveling legs;

[0032] 3. Feed and bracket module: 31. Unified interface feed; 32. Quick installation positioning plate; 33. Feed positioning mounting bracket; 322. Thumb-type quick lock knob; 321. Reserved positioning mark point;

[0033] 4. Multi-point laser alignment module: 41. Feed source positioning laser (light) × 4; 42. Quiet zone center positioning cross laser (light) × 2; 43. Phase center point; 44. Quiet zone center point; 45. Quiet zone center ground projection point;

[0034] 5. Target support and calibration module: 51. Leveling base; 52. Turntable; 53. Low scatter bracket; 54. Calibration body;

[0035] 6. Absorbing module: 61. Pyramid absorbing material inside the cabin; 62. Thatch-type absorbing material on the mobile traction bearing base; 63. Thatch absorbing material on the feed bracket; 64. Pyramid absorbing material behind the feed probe; 65. Ground axe-split absorbing material. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, not all of them, and do not constitute a limitation of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] First, the following terms may be used in this article:

[0038] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y includes both “X” or “Y” and “X and Y”.

[0039] The terms "include," "comprises," "contains," "has," or other similar expressions should be interpreted as non-exclusive. For example, "including certain technical features (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products, or manufactured articles, etc.) should be interpreted as including not only the technical features explicitly listed, but also other technical features known in the art that are not explicitly listed.

[0040] The term "consisting of" excludes any technical features not explicitly listed. If used in a claim, this term renders the claim closed, excluding any technical features other than those explicitly listed, except for conventional impurities associated with them. If this term appears only in a clause of a claim, it limits only the elements explicitly listed in that clause; elements listed in other clauses are not excluded from the claim as a whole.

[0041] Unless otherwise specified or limited, the terms "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this document based on specific circumstances.

[0042] The terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to this document.

[0043] The contents not described in detail in the examples of the present invention belong to the prior art known to those skilled in the art. If specific conditions are not specified in the examples of the present invention, the methods are carried out according to conventional conditions in the art or the conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments used in the examples of the present invention are not specified, they are all conventional products that can be purchased commercially.

[0044] The movable on-site rapid deployment open compact field system of the present invention comprises a flying wing open movable shelter module, a reflective surface and back frame module, a feed source and bracket module, a multi-point laser alignment module, a target support and calibration module, a radio frequency post-transmission module and an absorbing module;

[0045] The flying wing open movable cabin module includes a supporting foot, a movable traction bearing base, a flying wing open cabin, and an electric push rod;

[0046] The supporting feet are used to fix the mobile traction bearing base;

[0047] The mobile traction bearing base can realize long-distance mobile transportation of the test system through the traction vehicle head;

[0048] The flying wing open cabin is fixed on a mobile traction bearing base, and the flying wings on both sides are expanded and retracted by electric push rods.

[0049] The reflecting surface and back frame module includes a reflecting surface, a reflecting surface mounting back frame, an electric telescopic slide base, and electric reflecting surface leveling legs;

[0050] The surface accuracy of the reflecting surface must meet the maximum design operating frequency 1% wavelength accuracy requirement;

[0051] The reflective surface is fixed on the reflective surface mounting back frame, and the reflective surface mounting back frame is fixed on the electric telescopic slide base by bolts;

[0052] The electric telescopic slide base has a repeatability accuracy of better than ±0.05 mm, and is required to be able to push out and retract the reflective surface within 1 minute;

[0053] The electric reflective surface leveling legs are installed at the four corners of the electric telescopic slide base and fixed to the bottom plate of the flying wing open cabin by bolts. They have the function of two-way electric horizontal adjustment, the horizontal adjustment accuracy is better than 0.1°, and the leveling time is less than 3 minutes.

[0054] The feed and bracket module includes a unified interface feed, a quick installation positioning plate, and a feed positioning and mounting bracket;

[0055] Four reserved positioning marking points with a diameter of 3 mm are set at the corner points of the quick installation positioning plate for laser positioning of the feed source;

[0056] The unified interface feed is designed according to a unified interface size for different frequency bands;

[0057] The feed source positioning mounting bracket can realize the six-degree-of-freedom positioning adjustment of the feed source, the accuracy requirement of the position adjustment meets ±0.05mm, and the angle adjustment resolution meets ±0.05°.

[0058] The multi-point laser alignment module includes four feed positioning point lasers and two quiet zone center positioning cross lasers;

[0059] The feed source positioning point laser and the quiet zone center positioning cross laser are installed on the base of the electric telescopic slide. The spot radius of the feed source positioning point laser at the feed source phase center is less than 2mm, and the spot is clearly visible under strong sunlight.

[0060] The range of the cross laser positioned at the center of the quiet zone is greater than the distance from the center of the quiet zone to the vertex of the reflecting surface, and the light spot is clearly visible under strong sunlight.

[0061] The target support and calibration module includes a leveling base, a turntable, a low-scattering bracket, and a calibration body. The positioning body includes a standard sphere calibration body, a corner reflector, and a flat plate calibration body.

[0062] The repeatability of the turntable is less than 0.01°.

[0063] The horizontal adjustment error of the leveling base is better than 0.1°.

[0064] The absorbing module includes a pyramid absorbing material in the cabin, a thatched absorbing material on the mobile traction bearing base, a thatched absorbing material on the feed bracket, a pyramid absorbing material after the feed probe, and a ground axe-split absorbing material;

[0065] The height of the ground-split absorbing material is above 500 mm, the laying width is not less than the width of the reflecting surface, and the laying range covers the ground projection size of the quiet zone.

[0066] The method for implementing the on-site deployment of the above-mentioned mobile on-site rapid deployment open compact yard system comprises the following steps:

[0067] S1: Transportation to the test site and on-site positioning in the compact field: After the vehicle is pulled to the test site, the compact field is positioned so that the target is within the quiet zone of the compact field. The flying wing open cabin (and other internal modules) are fixed with support feet. This step takes less than 10 minutes.

[0068] S2: Pushing out and leveling the reflective surface: Power is turned on and the electrically controlled electric push rod opens the side door of the flying wing shelter. The electrically controlled electric telescopic slide base pushes out the back frame and reflective surface module and levels them using the electrically controlled reflective surface leveling legs. The leveling accuracy is better than 0.1° and this step takes less than 5 minutes to complete.

[0069] S3: Positioning of feed and bracket module, target support and calibration module;

[0070] S4: Laying of absorbing modules: In this embodiment, the thin materials permanently laid include: pyramidal absorbing materials in the cabin and pyramidal absorbing materials behind the feed probe;

[0071] S5: Complete the target feature test task. The test time is not included in the total deployment time.

[0072] S6: System storage, test completed: The electrically controlled electric telescopic slide base first retracts the reflective surface and reflective surface mounting back frame into the cabin, and the electrically controlled electric leveling legs are retracted; the feed source and bracket module turntable are stored in the flying wing open cabin; the target support and calibration module are stored in the flying wing open cabin; the thatch absorbing material on the feed source bracket and the ground axe-chopped absorbing material are recovered in the flying wing open cabin; the flying wing cabin side door is retracted, and the power is turned off to complete the test; this step takes less than 30 minutes to implement.

[0073] When performing step S3:

[0074] If the feed and bracket module, target support and calibration module have not been calibrated before or need to be calibrated again, follow the steps below to complete it:

[0075] S311: Determine the theoretical position of the phase center and the quiet zone center: Use a laser tracker to scan and measure the reflective surface to establish a reflective surface coordinate system to determine the feed phase center position, the quiet zone center point position, and the ground projection point of the quiet zone center. This step takes less than 15 minutes to complete.

[0076] S312: Feed position calibration: Adjust the feed positioning mounting bracket so that the phase center position accuracy of the unified interface feed meets ±0.1mm and the pointing accuracy is less than 0.1°; install the four feed positioning lasers on the front ends of the electric telescopic slide base, and adjust the laser spots so that their spots are aligned with the four marking points reserved on the quick installation positioning plate to complete the feed position calibration. This step takes less than 15 minutes to implement.

[0077] S313: Quiet zone position calibration: Install two quiet zone center positioning cross lasers on the front center of the electric telescopic slide base and adjust them so that the center points of their crosshairs are aligned with the quiet zone center point and the ground projection point of the quiet zone center respectively. Complete the quiet zone position calibration. This step takes less than 10 minutes to implement.

[0078] S314: Target support and calibration module position calibration: Install the turntable and low-scattering bracket according to the center position of the cross laser line projected by the quiet zone center positioning cross laser on the ground and adjust the level to a level error of less than 0.1° to complete the target support and calibration module positioning. This step takes less than 10 minutes to complete.

[0079] If the feed source and bracket module, target support and calibration module do not need to be calibrated, or the position calibration has been completed before and no recalibration is required, follow the steps below to complete it;

[0080] S321: Four-point feed positioning: Turn on the four feed positioning lasers, adjust the feed and bracket module so that the four marking points reserved on the quick installation positioning plate are aligned with the four feed positioning laser spots respectively, and complete the feed positioning. This step takes less than 10 minutes to implement;

[0081] S322: Target support and calibration module center positioning: Turn on the two quiet zone center positioning cross lasers, install the turntable and low-scattering bracket 53 according to the center position of the cross laser line projected by the quiet zone center positioning cross laser on the ground, and adjust the level to a level error of less than 0.1°. The target support and calibration module positioning is completed. This step takes less than 10 minutes.

[0082] The step S4 includes the following steps:

[0083] S41: To reduce the interference of the flying wing open movable cabin module on the test, hang thatch-type absorbing material on the mobile traction support base in the quiet zone area facing the mobile traction support base. This step takes less than 5 minutes.

[0084] S42: To reduce the interference of the feed source and the bracket module on the test, hang the feed bracket on the thatch absorbing material around the feed source and the bracket module. This step takes less than 2 minutes.

[0085] S43: To reduce the impact of ground scattering, lay a 500mm thick or more axe-split sponge absorbing material on the ground between the reflecting surface and the test quiet zone. This step takes less than 25 minutes.

[0086] In summary, the system and method for rapidly deploying an open compact range in a mobile on-site environment according to the embodiments of the present invention utilize a mobile shelter design to enable remote on-site mobile deployment. This overcomes the technical barriers of traditional fixed compact ranges and enables accurate RCS and antenna pattern testing at the target site.

[0087] The present invention adopts an open flying wing and external feed design to break through the internal size limitations of the cabin and is suitable for testing requirements of larger targets and antennas. The present invention adopts automatic extension and retraction of the reflective surface, electric leveling, multi-point laser feed alignment and a unified feed interface design. After the system arrives at the target site, it can be quickly deployed and meet the testing conditions within 90 minutes. After completing the test task, the system can be stored within 30 minutes.

[0088] In order to more clearly demonstrate the technical solutions and technical effects provided by the present invention, the embodiments of the present invention are described in detail below with reference to specific embodiments.

[0089] Example 1

[0090] A mobile on-site rapid deployment open compression field system is described as follows:

[0091] like Figure 1a 、 Figure 1b As shown, the present invention provides a movable on-site rapid deployment open compact field system, which consists of a flying wing open movable cabin module 1, a reflective surface and back frame module 2, a feed and bracket module 3, a multi-point laser alignment module 4, a target support and calibration module 5, and an absorbing module 6.

[0092] like Figure 2 As shown, the wing-open movable shelter module 1 includes support feet 11, a mobile traction support base 12, a wing-open shelter 13, and electric push rods 14. The support feet 11 are used to secure the mobile traction support base 12. The mobile traction support base 12 enables long-distance transport of the test system via a tractor. In this embodiment, the mobile traction support base 12 has an effective load capacity of 20 tons and a saddle height of 1300 mm. The wing-open shelter 13 is fixed to the mobile traction support base 12. In this embodiment, the outer frame dimensions of the wing-open shelter 13 are 6800 mm long, 2700 mm wide, and 2800 mm high, with effective internal dimensions of 6600 mm long, 2500 mm wide, and 2600 mm high. Its wings can be deployed and retracted within two minutes using two electric push rods 14, each with a thrust exceeding 2000 kg. The wings can open at a 98° angle, and the minimum distance between the wings and the reflective surface when deployed is 520 mm.

[0093] like Figure 3 As shown, the reflector and back frame module 2 includes a reflector 21, a back frame for mounting the reflector 22, an electrically operated telescopic slide base 23, and electrically operated reflector leveling legs 24. In this embodiment, the reflector 21 is an orthogonal frame mold skin negative pressure formed curled reflector. The central area is a rotational parabola with a focal length of 5400mm, and the surrounding edge areas are non-analytical surfaces. The reflector has a projected size of 4500mm long by 2100mm high. It adopts an angle-fed and offset-fed arrangement and is tilted approximately 1200mm in the width direction of the flying wing open cabin 13. The reflector has an RMS accuracy of 0.056mm, meeting the accuracy requirement of 1 / 100th of a wavelength (0.075mm) for the maximum design operating frequency of 40GHz. The designed quiet zone size is 3000mm wide by 1000mm high by 3000mm deep, which greatly improves the quiet zone size compared to the closed cabin darkroom solution and is suitable for larger target testing requirements.

[0094] In this embodiment, the reflective surface 21 is mounted and fixed on a mounting frame of the reflective surface 22 , and the mounting frame of the reflective surface 22 is fixed on a base 23 of the electric telescopic slide by means of bolts.

[0095] In this embodiment, the electric telescopic slide base 23 adopts a profile welded base gear rack four linear guide servo motor drive structure, with an effective stroke of 1300mm and a repeat positioning accuracy better than ±0.05mm. The maximum movement speed of the slide is designed to be 50mm / s, and the reflective surface can be pushed out and retracted within 1 minute.

[0096] In this embodiment, the electric reflective surface leveling legs 24 use four servo-driven screw legs, which are installed at the four corners of the electric telescopic slide base 23 and fixed to the bottom plate of the flying wing open cabin 13 by bolts. Each leg can bear a load of 2000kg and has the function of two-way electric horizontal adjustment. The horizontal adjustment accuracy is better than 0.1°, and the leveling time is less than 3 minutes.

[0097] like Figure 4a 、 Figure 4b 、 Figure 4c 、 Figure 4d 、 Figure 4e As shown, the feed and bracket module 3 includes a unified interface feed 31, a quick installation positioning plate 32, and a feed positioning mounting bracket 33. Four reserved positioning identification points 321 with a diameter of 5 mm are set at the corner points of the quick installation positioning plate 32 for laser positioning of the feed. At the same time, a thumb-type quick lock knob 322 is selected in this example to achieve rapid polarization adjustment of the feed and rapid replacement of feeds of different bands. The unified interface feed 31 is designed according to a unified interface size for different frequency bands. The feed positioning mounting bracket 33 can achieve six-degree-of-freedom positioning adjustment of the feed.

[0098] like Figure 5a 、 Figure 5b 、 Figure 5c As shown, the multi-point laser alignment module 4 includes four feed positioning point lasers 41 and two quiet zone center positioning cross lasers 42. The feed positioning point lasers 41 are installed on the base of the electric telescopic slide base 23. The four feed positioning point lasers 41 and two quiet zone center positioning cross lasers 42 selected in this example have the following parameters: power 135mw, wavelength 520nm, laser color green, among which the feed positioning point laser 41 has a spot radius of <2mm at 10m, the quiet zone center positioning cross laser 42 has a range of 65m, the laser line width within 10 meters is less than 3mm, and the spot is clearly visible under strong sunlight.

[0099] like Figure 6As shown, the target support and calibration module 5 includes: a leveling base 51, a turntable 52, a low-scatter bracket 53, and a calibration body 54 (including but not limited to a standard sphere calibration body, a corner reflector, and a flat plate calibration body). Preferably, in this embodiment, the turntable 52 has a positioning accuracy better than ±0.01°, a table size of 600mm, a load capacity greater than 500kg, and is installed on the leveling base 51 with a horizontal adjustment function, with a horizontal adjustment error better than 0.1°. The low-scatter bracket 53 is made of high-density polyurethane foam with low scattering characteristics. The bottom diameter of the low-scatter bracket 53 is 600mm, which fits the turntable 52 table surface. The bracket height is 2600mm and has a load capacity of 200kg.

[0100] In this example, the absorbing module 6 includes: a pyramidal absorbing material 61 inside the cabin, a thatched absorbing material 62 on the mobile traction bearing base, a thatched absorbing material 63 on the feed bracket, a pyramidal absorbing material 64 behind the feed probe, and a ground axe-split absorbing material 65.

[0101] Preferably, the top, front and rear wings and bottom plate of the open-wing cabin 13 are permanently paved with pyramidal absorbing materials 61 inside the cabin. In this embodiment, 200 mm sponge pyramidal absorbing materials are selected.

[0102] Preferably, in order to reduce the interference of the flying wing open movable cabin module 1 on the test, in this embodiment, a thatched-type absorbing material 62 is hung on the mobile traction and bearing base 12 in the quiet zone area, which can be quickly laid and stored within 2 minutes;

[0103] Preferably, in order to reduce the interference of the feed source and the bracket module 3 on the test, in this embodiment, a thatched absorbing material 63 is hung on the feed bracket around the feed source and the bracket module 3, which can be quickly laid and stored within 5 minutes;

[0104] Preferably, to reduce interference from the feed source and support module 3 to the test, in this embodiment, a feed source probe rear pyramid absorbing material 64 is permanently laid behind the unified interface feed source 31 probe. In this embodiment, 60mm sponge pyramid absorbing material is selected.

[0105] To minimize the effects of ground scattering, this embodiment utilizes a 500mm thick sponge absorbing material 65, laid on the ground between the reflective surface and the test quiet zone. The paving area is 7000mm long by 5000mm wide, covering the projected dimensions of the quiet zone. The paving of the absorbing material 65 can be completed within 20 minutes.

[0106] Embodiment 2 of the present invention, as Figure 7 As shown, a method for on-site deployment of a mobile on-site rapid deployment open compact field system includes the following steps:

[0107] S1: Transportation to the compact range and on-site positioning: After the vehicle is transported to the test site via the compact range, the position of the compact range is adjusted so that the target is within the quiet zone of the compact range. The flying wing open cabin 13 (and other modules inside) are fixed using the support feet 11. This step takes less than 10 minutes.

[0108] S2: Pushing out and leveling the reflective surface: Power is turned on, and the electrically controlled electric push rod 14 opens the side door of the flying wing open cabin 13. The electrically controlled electric telescopic slide base 23 pushes out the back frame and reflective surface 21 module and levels it through the electrically controlled reflective surface leveling legs 24. The leveling accuracy is better than 0.1°. This step takes less than 5 minutes to implement.

[0109] S3: Positioning of feed and bracket module, target support and calibration module;

[0110] S31: If the feed and support module 3 and the target support and calibration module 5 have not completed the initial calibration before or need to be calibrated again, complete it according to the following steps;

[0111] S311: Determine the theoretical positions of the phase center and the quiet zone center: Use a laser tracker to scan and measure the reflective surface to establish a reflective surface 21 coordinate system to determine the position of the feed phase center point 43, the quiet zone center point 44, and the ground projection point 45 of the quiet zone center. This step takes less than 15 minutes.

[0112] S312: Feed position calibration: Adjust the feed positioning mounting bracket 33 so that the phase center position accuracy of the unified interface feed 31 meets ±0.1mm and the pointing accuracy is less than 0.1°; install the four feed positioning point lasers 41 on the front ends of the base of the electric telescopic slide 23, and adjust the laser spot so that its spot is respectively aligned with the four marking points reserved on the quick installation positioning plate to complete the feed position calibration. This step takes less than 15 minutes to implement;

[0113] S313: Quiet zone position calibration: Install two quiet zone center positioning cross lasers 42 on the front center of the electric telescopic slide base 23 and adjust them so that the center points of their cross lines are aligned with the quiet zone center point 44 and the ground projection point 45 of the quiet zone center respectively. This step takes less than 10 minutes to complete the quiet zone position calibration.

[0114] S314: Target support and calibration module position calibration: Install the turntable 52 and low-scattering bracket 53 at the center of the cross laser line projected on the ground by the center positioning cross laser 42 in the quiet zone and adjust the level to a level error of less than 0.1°. This completes the positioning of the target support and calibration module 5. This step takes less than 10 minutes.

[0115] S32: If the feed source, turntable, and bracket have been calibrated before and do not need to be calibrated again, follow the steps below to complete the calibration.

[0116] S321: Four-point feed positioning: Turn on the four feed positioning point lasers 41, adjust the feed and bracket module 3 so that the four marking points reserved on the quick installation positioning plate 32 are aligned with the four feed positioning point lasers 41 spots, and complete the feed positioning. This step takes less than 10 minutes to implement;

[0117] S322: Target support and calibration module center positioning: Turn on the two quiet zone center positioning cross lasers 42, install the turntable 52 and low-scattering bracket 53 according to the center position of the cross laser line projected on the ground by the quiet zone center positioning cross lasers 42, and adjust the level to a level error of less than 0.1°. This completes the positioning of the target support and calibration module 5. This step takes less than 10 minutes.

[0118] S4: Laying of absorbing modules: The thin materials permanently laid in this embodiment include: pyramidal absorbing materials 61 (200 mm sponge pyramidal absorbing materials) in the cabin and pyramidal absorbing materials 64 (60 mm sponge pyramidal absorbing materials) behind the feed probe.

[0119] S41: Preferably, to reduce the interference of the flying wing open movable cabin module 1 on the test, in this embodiment, a thatched-type absorbing material 62 is hung on the mobile traction and support base 12 in the quiet zone area. This step takes less than 5 minutes.

[0120] S42: Preferably, to reduce the interference of the feed source and the bracket module 3 on the test, in this embodiment, thatch absorbing material 63 is hung on the feed bracket around the feed source and the bracket module 3. This step takes less than 2 minutes to implement;

[0121] S43: To reduce the influence of ground scattering, in this embodiment, a ground-split absorbing material 65 is preferably laid. A 500 mm thick sponge absorbing material is used and laid on the ground in the middle area between the reflecting surface and the test quiet zone. The laying area is 7000 mm long x 3000 mm wide. This step takes less than 25 minutes.

[0122] S5: Complete the target feature test task (testing time is not included in the total deployment time);

[0123] S6: The system is stored and the test is completed: the electrically controlled electric telescopic slide base 23 first retracts the reflective surface 21 and the reflective surface 22 mounting back frame into the cabin, and the electrically controlled electric reflective surface leveling legs 24 are retracted; the feed source and bracket module 3 turntable is stored in the flying wing open cabin 13; the target support and calibration module 5 is stored in the flying wing open cabin 13; the thatch absorbing material 63 on the feed source bracket and the ground axe-chopped absorbing material 65 are recovered in the flying wing open cabin 13; the flying wing cabin side door is retracted, and the power is turned off to complete the test; this step takes less than 30 minutes to implement.

[0124] In summary, the embodiments of the present invention provide a mobile, on-site, rapidly deployable, open compact range system. The mobile traction bearing base can realize long-distance mobile transportation of the test system through the traction vehicle head, breaking the barrier that traditional compact ranges can only be tested in fixed sites. In the embodiment of the present invention, a side-opening flying wing cabin with an outer frame size of 6800mm long × 2700mm wide × 2800mm high is arranged in an angle-fed and offset-fed arrangement with a curled reflector with a projected size of 4500mm long × 2100mm high. The quiet zone size is 3000mm wide × 1000mm high × 3000mm deep, and the operating frequency is 3-40GHz. Compared with the closed cabin darkroom solution, the quiet zone size is greatly improved, which is suitable for larger target testing requirements. In the embodiment of the present invention, after the compact range system arrives at the test site, the feed source and bracket module, target support and calibration module are calibrated according to whether the site needs to be calibrated. The system deployment and test conditions can be completed within 90 minutes and 60 minutes respectively; after the test task is completed, the system can be stored within 30 minutes.

[0125] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art.

Claims

1. A mobile, on-site, rapidly deployable, open, compact field system, characterized by: It includes a flying wing open movable cabin module, a reflector and back frame module, a feed and bracket module, a multi-point laser alignment module, a target support and calibration module, a radio frequency post-transmission module and an absorbing module; The flying wing open movable cabin module includes a supporting foot, a movable traction bearing base, a flying wing open cabin, and an electric push rod; The supporting feet are used to fix the mobile traction bearing base; The mobile traction bearing base can realize long-distance mobile transportation of the test system through the traction vehicle head; The flying wing open cabin is fixed on a mobile traction bearing base, and the wings on both sides are expanded and retracted by electric push rods; The reflecting surface and back frame module includes a reflecting surface, a reflecting surface mounting back frame, an electric telescopic slide base, and electric reflecting surface leveling legs; The surface accuracy of the reflecting surface must meet the maximum design operating frequency 1% wavelength accuracy requirement; The reflective surface is fixed on the reflective surface mounting back frame, and the reflective surface mounting back frame is fixed on the electric telescopic slide base by bolts; The electric telescopic slide base has a repeatability accuracy of better than ±0.05 mm, and is required to be able to push out and retract the reflective surface within 1 minute; The electric reflective surface leveling legs are installed at the four corners of the electric telescopic slide base and fixed to the bottom plate of the flying wing open cabin by bolts. They have the function of two-way electric level adjustment, the level adjustment accuracy is better than 0.1°, and the leveling time is less than 3 minutes. The feed and bracket module includes a unified interface feed, a quick installation positioning plate, and a feed positioning and mounting bracket; Four reserved positioning marking points with a diameter of 3 mm are set at the corner points of the quick installation positioning plate for laser positioning of the feed source; The unified interface feed is designed according to a unified interface size for different frequency bands; The feed source positioning mounting bracket can realize the six-degree-of-freedom positioning adjustment of the feed source, the position adjustment accuracy requirement meets ±0.05mm, and the angle adjustment resolution meets ±0.05°; The multi-point laser alignment module includes four feed positioning point lasers and two quiet zone center positioning cross lasers; The feed source positioning point laser and the quiet zone center positioning cross laser are installed on the base of the electric telescopic slide. The spot radius of the feed source positioning point laser at the feed source phase center is less than 2mm, and the spot is clearly visible under strong sunlight. The range of the cross laser positioned at the center of the quiet zone is greater than the distance from the center of the quiet zone to the vertex of the reflecting surface, and the light spot is clearly visible under strong sunlight.

2. The mobile on-site rapid deployment open compression field system according to claim 1 is characterized in that: The target support and calibration module includes a leveling base, a turntable, a low-scattering bracket, and a calibration body, wherein the calibration body includes a standard sphere calibration body, a corner reflector, and a flat plate calibration body; The repeatability of the turntable is less than 0.01°. The horizontal adjustment error of the leveling base is better than 0.1°.

3. The mobile on-site rapid deployment open compression field system according to claim 2, characterized in that: The absorbing module includes a pyramid absorbing material in the cabin, a thatched absorbing material on the mobile traction bearing base, a thatched absorbing material on the feed bracket, a pyramid absorbing material after the feed probe, and a ground axe-split absorbing material; The height of the ground-split absorbing material is above 500 mm, the laying width is not less than the width of the reflecting surface, and the laying range covers the ground projection size of the quiet zone.

4. A method for implementing on-site deployment of a mobile on-site rapidly deployable open compact field system according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: Transportation to the test site and on-site positioning in the compact field: After the vehicle is pulled to the test site, the compact field is positioned so that the target is within the quiet zone of the compact field. The flying wing open cabin and other internal modules are fixed with support feet. This step takes less than 10 minutes. S2: Pushing out and leveling the reflective surface: Power is turned on and the electrically controlled electric push rod opens the side door of the flying wing shelter. The electrically controlled electric telescopic slide base pushes out the back frame and reflective surface module and levels them using the electrically controlled reflective surface leveling legs. The leveling accuracy is better than 0.1° and this step takes less than 5 minutes to complete. S3: Positioning of feed and bracket module, target support and calibration module; S4: Laying of absorbing modules: In this embodiment, the thin materials permanently laid include: pyramidal absorbing materials in the cabin and pyramidal absorbing materials behind the feed probe; S5: Complete the target feature test task. The test time is not included in the total deployment time. S6: System storage, test completed: The electrically controlled electric telescopic slide base first retracts the reflective surface and reflective surface mounting back frame into the cabin, and the electrically controlled electric leveling legs are retracted; the feed source and bracket module turntable are stored in the flying wing open cabin; the target support and calibration module are stored in the flying wing open cabin; the thatch absorbing material on the feed source bracket and the ground axe-chopped absorbing material are recovered in the flying wing open cabin; the flying wing cabin side door is retracted, and the power is turned off to complete the test; this step takes less than 30 minutes to implement.

5. The method for on-site deployment of a mobile on-site rapid deployment open compact field system according to claim 4, characterized in that: When performing step S3: If the feed and bracket module, target support and calibration module have not been calibrated before or need to be calibrated again, follow the steps below to complete it: S311: Determine the theoretical position of the phase center and the quiet zone center: Use a laser tracker to scan and measure the reflective surface to establish a reflective surface coordinate system to determine the feed phase center position, the quiet zone center point position, and the ground projection point of the quiet zone center. This step takes less than 15 minutes to complete. S312: Feed position calibration: Adjust the feed positioning mounting bracket so that the phase center position accuracy of the unified interface feed meets ±0.1mm and the pointing accuracy is less than 0.1°; install the four feed positioning lasers on the front ends of the electric telescopic slide base, and adjust the laser spots so that their spots are aligned with the four marking points reserved on the quick installation positioning plate to complete the feed position calibration. This step takes less than 15 minutes to implement. S313: Quiet zone position calibration: Install two quiet zone center positioning cross lasers on the front center of the electric telescopic slide base and adjust them so that the center points of their crosshairs are aligned with the quiet zone center point and the ground projection point of the quiet zone center respectively. Complete the quiet zone position calibration. This step takes less than 10 minutes to implement. S314: Target support and calibration module position calibration: Install the turntable and low-scattering bracket according to the center position of the cross laser line projected by the quiet zone center positioning cross laser on the ground and adjust the level to a level error of less than 0.1° to complete the target support and calibration module positioning. This step takes less than 10 minutes to complete. If the feed source and bracket module, target support and calibration module do not need to be calibrated, or the position calibration has been completed before and no recalibration is required, follow the steps below to complete it; S321: Four-point feed positioning: Turn on the four feed positioning lasers, adjust the feed and bracket module so that the four marking points reserved on the quick installation positioning plate are aligned with the four feed positioning laser spots respectively, and complete the feed positioning. This step takes less than 10 minutes to implement; S322: Target support and calibration module center positioning: Turn on the two quiet zone center positioning cross lasers, install the turntable and low-scattering bracket 53 according to the center position of the cross laser line projected by the quiet zone center positioning cross laser on the ground and adjust the level. The level error is less than 0.1°. The target support and calibration module positioning is completed. This step takes less than 10 minutes to implement.

6. The method for on-site deployment of a mobile on-site rapid deployment open compact field system according to claim 5, characterized in that: The step S4 includes the following steps: S41: To reduce the interference of the flying wing open movable cabin module on the test, hang thatch-type absorbing material on the mobile traction support base in the quiet zone area facing the mobile traction support base. This step takes less than 5 minutes. S42: To reduce the interference of the feed source and the bracket module on the test, hang the feed bracket on the thatch absorbing material around the feed source and the bracket module. This step takes less than 2 minutes. S43: To reduce the impact of ground scattering, lay a 500mm thick or more axe-split sponge absorbing material on the ground between the reflecting surface and the test quiet zone. This step takes less than 25 minutes.

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